Bug: Boolean Difference creates weird Boolean Union instead

[martinsiegrist]

Boolean difference between a self intersecting pipe and open surfaces:

Celtic Knotwork self-intersections and intersections

Not much time nowadays but wanted to test an idea: If this was a curve drawn by hand, the curve would go over the already drawn curve at an intersection. The definition below uses pipes instead of offset. Since the larger diameter pipes are open surfaces they only subtract geometry from the initial pipe where they intersect and not where they are “co-axial” with the pipe. [image] [image] [image] offset_curve_with_gaps.gh (14.2 KB)

@martinsiegrist

Thee selected pipes on the second screenshot are open surfaces. They only get subtracted from the part of the other pipe which intersects.